Reichle, K. J., K. Reimann, W. Sprengel, A. A. Rempel, A. Müller and H.-E. Schaefer: Thermal evolution of free volumes and of crystallization in amorphous Si-B-C-N ceramics. In: International Journal of Materials Research 97, 5, 621-625 (2006).
Wu, Y. C., W. Sprengel, K. Reimann, K. J. Reichle, D. Goll, R. Würschum and H. E. Schaefer: Defects distribution of Pr2Fe14B hard magnetic magnet from amorphous to nanostructures characterized by positron annihilation spectroscopy. In: PRICM 5. Proceedings of the Fifth Pacific RIM International Conference on Advanced Materials and Processing, (Eds.) Saka, H.; Kim, T. H.; Holm, E. A.; Han, Y. F.; Xie, X. S. Materials Science Forum 475-479. Trans Tech, Uetikon-Zürich (2005) 2123-2126.
Weigand, H., W. Sprengel, R. Rower, H. E. Schaefer, T. Wejrzanowski and M. Kelsch: Interfacial free volumes and segregation effects in nanocrystalline Pd85Zr15 studied by positron annihilation. In: Applied Physics Letters 84, 17, 3370-3372 (2004).
Ye, F., W. Sprengel, X. Y. Zhang, E. Uhrig, W. Assmus and H.-E. Schaefer: High temperature vacancy studies of icosahedral Zn65Mg25Er10 quasicrystal. In: Journal of Physics: Condensed Matter 16, 1531-1537 (2004).
Zhang, X. Y., W. Sprengel, K. J. Reichle, K. Blaurock, R. Henes and H. E. Schaefer: Slow removal of vacancies in B2-Ni52Al48 upon long-term low-temperature annealing. In: Physical Review B 68, 22, Seq. No.: 224102 (2003).
Sato, K., F. Baier, A. A. Rempel, W. Sprengel and H. E. Schaefer: Observation of high-temperature thermal vacancies in Al70Pd21Mn9 quasicrystals. In: Physical Review B 68, 21, Seq. No.: 214203 (2003).
Zhang, X. Y., W. Sprengel, K. J. Reichle, K. Blaurock, R. Henes and H. E. Schaefer: Slow removal of vacancies in B2-Ni52Al48 upon long-term low-temperature annealing. In: Physical Review B 68, 22, Seq. No.: 224102 (2003).
Rempel, A. A., W. Sprengel, K. Blaurock, K. J. Reichle, J. Major and H. E. Schaefer: Comment on "Identification of lattice vacancies on the two sublattices of SiC" - Reply. In: Physical Review Letters 91, 19, Seq. No.: 199602 (2003).
Rempel, A. A., W. Sprengel, K. Blaurock, K. J. Reichle, J. Major and H. E. Schaefer: Comment on "Identification of lattice vacancies on the two sublattices of SiC" - Reply. In: Physical Review Letters 91, 10, Seq. No.: 109602 (2003).
Wu, Y. C., F. Ye, V. Barbe, W. Sprengel, K. Reimann, K. J. Reichle, D. Goll, R. Würschum and H. E. Schaefer: Characterization of free volumes in amorphous and nanostructured Pr2Fe14B using positron lifetime spectroscopy. In: Physica Status Solidi A-Applied Research 198, 1, 204-209 (2003).
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